According to the User Manual documentation:
To get buttons to do things, you add an Action to the actionPerformed event. … Buttons can also be activated by tabbing over to them and hitting Enter or Space, or they could be activated by pressing Alt and the button’s mnemonic character. …
So I have placed my script on the actionPerformed event; however, when I tab to the button and press either enter key on my keyboard it doesn’t run the script. It does work if I tab to the button and press the space bar. Please let me know what I am missing!